geometry[rotation] - find the rotation of a geometric object with respect to a given point

Calling Sequence

rotation(Q, P, g, co, R)

Parameters

Q

-

the name of the object to be created

P

-

geometric object

g

-

the angle of rotation

co

-

the direction of rotation, either clockwise or counterclockwise

R

-

(optional) the center of rotation

Description

•

Let R be a fixed point of the plane, g and co denote the sensed angle. By the rotation we mean the transformation of S onto itself which carries each point P of the plane into the point P1 of the plane such that OP1 = OP and the angle in the direction specified by co.

•

Point O is called the center of the rotation, and g is called the angle of the rotation.

•

If the fifth argument is omitted, then the origin is the center of rotation.

•

For a detailed description of the object created Q, use the routine detail (i.e., detail(Q))

•

The command with(geometry,rotation) allows the use of the abbreviated form of this command.